Dental tool holder



D. D. LEVY 2,093,682

DENTAL TOOL HOLDER Sept. 21, 1937.

Filed Nov. 13, 1935 HE.; mme

MYNRYW/ Tf, Z ,f INVENTOR. "v nfll D L; BY aal/ey D. Le Vy @@.Lmu

ATTORNEY `10 be apparent from the following description when a shaft S which has formed integrally therewith 10 detail in the following specification. that the end of the cam piece overlaps the end of 15 In the drawing, the chuck. When the shaft 8 revolves the cam Figure 1 is aside elevational view of a tool causes the chuck to reciprocate in a manner holder in accordance with this invention; which will be apparent, and in turn causes the `Figure 2 is an end elevational view thereof; tool to strike ablow in proportion to the pressure Figure 3 is a longitudinal, cross-sectional view with which the tool is brought to bear upon the 20 taken on the line 3-3 of Figure 2; surface being operated upon. Rotatably mount- Figure 4 is a cross-sectional View taken on the ed in the sleeve I is another short length of shaft line 4-4 of Figure 3; B which is connected to the shaft 8 by means of a line 5-5 of Figure 3; and This tool holder may be attached to any suit- 25 it will be apparent as the `description proceeds the chuck cannot rotate about its longitudinal 30 to form acontinuous unit. The sleevev portion 2 to thoseskilled in the art that the details and 35 as is clear from Figure 6, has a recess of hexagoposes of illustration but rather to the scope of the 40 serves to hold the compression spring 30 between end thereof, said bushing having a recess in the 45 together against relative movement under the section and adapted to seat in said recess, a tool 50 to any one of six angular positions, as indicated angular positions in the plane of the axis of the 55 Patented Sept. v21, 1937 l UNITED STATES PATENT OFFICE DENTAL TOOL HOLDER Dudley D. Levy, Mount Vernon, N. Y., assignor to i Dudley Research Corporation, New York, N. Y., a corporation of New York Application November 13, 1935,` Serial No. 49,473

1 claim. (o1. .s2-54) v This invention relates to improvements in fits in the head-piece 5 and may be attached dental toolholders of the type which are power thereto in any suitable manner, as by sweating operated to cause movement of the tool. on. The headpiece `5 has a longitudinal passage The general object of this invention is to protherein in which is slidably mounted a tool chuck 5 vide an improved and simplified structure of this I0. 'Ihe tool chuck is held within the head by type adapted to easy manufacture and capable beading vthe end thereover, as indicated at Il.

of long and eicient use without substantial dete- One suitable form of tool is shown at I2 threadrioration due to wear. v edly mounted on the chuck.

The many detailed objects of this invention will Rotatably mounted in the tubular member 4 is taken in connection with the attached drawing. or mounted thereon in any suitable manner a cam This invention resides substantially in the compiece 9. The cross-sectional shape of this cam bination, construction, arrangement and relative piece is clear from Figure 4. The inner end of location of parts, all as will be described in greater the chuck is notched, as is clear from Figure 3, so

Figure 5 is a cross-sectional View taken on the flexible coupling member 'l'. i

Figure 6 is a cross-sectional View taken on the able form of power outlet, such as a flexible shaft, line 6 6 of Figure 3. in a manner well known in the art. The particu- `The tool holder is shown as of the bent type lar construction of the chuck and its intercon- `adapted to ready manipulation in the mouth but nection with the cam provides the advantage that that the principles of this invention are not axis but is held against such movement by the limited to this particular form of holder. As nesting of the cam in the right angled notch illustrated, the holder comprises a pair of sleeves formed directly in Ihe Chuck.

l and 2 threadedly or otherwise secured together From the above description it will be apparent is slightly bent longitudinally and has threadedly principles of this invention may be readily varied or otherwise mounted on the other end thereof a without departure from the full scope of the bushing 3 in which is slidably mounted the tubuinvention. I do not, therefore, desire to be `lar member 4. The exposed end of the bushing 3, strictly limited to the disclosure as given for purnal shape 3' formed in the end thereof. appended claims.

The tubular member 4 is provided with a re- What I seek to secure by Letters Patentis: duced portion which slidably ts in the bushing A dental tool holder as described, comprising a and terminates at its free end in a collar 4a which tubular handle having a bushing secured in one it and the end of the bushing. `The tubular memend kof polygonal cross-section, a sleeve slidably ber 4 is provided adjacent the hexagonal recess mounted in the bushing, means for resiliently of the bushing 3 with ahexagonal collar 4 posiresisting sliding movement of the sleeve, said tioned to nest in the recess and look the two parts y sleeve having a collar thereon of polygonal crossaction of spring 3D. However, when the tubular holder mounted in said sleeve, and means jourmember is 'pulled outwardly to compress the nalled in the handle and sleeve for operating the spring 30 the collar 4 is freed of the recess, pertool holder, said recess and collar cooperating to mitting relative rotation of the tubular member permit adjustment of the tool holder to various in Figure 6. tool holder.

The other end of the tubular member 4 is pron DUDLEY` D. LEVY. vided with a reduced cylindrical portion 4" which 

